The Hyperloop is a proposed new transportation method between Los Angeles and San Francisco, featuring capsules traveling in low-pressure tubes at high speeds. Proposed by Elon Musk as a more cost-effective and efficient alternative to California's high-speed rail, it promises advantages like safety, weather resistance, and a lower price tag. The Hyperloop aims to be a sustainable, solar-powered mode of transport, significantly cheaper than the projected $68 billion cost of the high-speed rail.